Palestinian gunmen kidnapped two foreign journalists working for the Fox News television channel in Gaza today, a witness said.
The witness, a Palestinian who worked with the two journalists, said one of them, a producer, was an American, and the other, whose nationality he did not know, was a cameraman.
In a news report, Fox confirmed two employees had been abducted. It said it did not know who seized them but that "negotiations were under way to secure their release".
There was no immediate claim of responsibility for the abduction.
The witness said two vehicles blocked the journalists' transmission truck in the centre of Gaza City and a masked man put a gun to a bodyguard's head, forcing him to the ground.
The kidnappers then sped away with the two journalists.
Palestinian police stopped and searched cars. A spokesman for Hamas, the Islamic militant group that leads the Palestinian government, condemned the kidnapping.
Similar incidents in the past in Gaza have ended with the release, usually within hours, of kidnapped foreign journalists or aid workers.
Many of the abductions were carried out by Palestinians pressing a grievance against the Palestinian government or its security forces.
Agencies